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Bob Chamberlin / Los Angeles Times

One of the huge orcas surfaces near a whale-watching boat as it cruises off Newport Beach. Marine mammal experts said the killer whales may be from an "offshore" population based in British Columbia. They said the orcas travel in massive numbers and prefer to feed on sharks and other prey. See full story

One of the huge orcas surfaces near a whale-watching boat as it cruises off Newport Beach. Marine mammal experts said the killer whales may be from an "offshore" population based in British Columbia. They said the orcas travel in massive numbers and prefer to feed on sharks and other prey. See full story (Bob Chamberlin / Los Angeles Times)

One of the huge orcas surfaces near a whale-watching boat as it cruises off Newport Beach. Marine mammal experts said the killer whales may be from an "offshore" population based in British Columbia. They said the orcas travel in massive numbers and prefer to feed on sharks and other prey. See full story